The UEI TACH2 Digital Contact and IR Tachometer measures rates up to 99,999 RPM with extreme accuracy. Utilizing both an IR laser and contact attachments, the UEI TACH2 Digital Contact and IR Tachometer has a wide variety of moving objects it can measure including fans, motors, and conveyor belts. The UEI TACH2 Digital Contact and IR Tachometer comes in a kit with everything you need including a 9v battery, operation manual, both cone and funnel contact tips, and reflective tape when using the IR function.